Wash the potatoes thoroughly, peel them, and slice them thinly.
Julienne the onion and carrot.
Add cooking oil to a pan and sauté the potatoes first.
When the potatoes are halfway cooked, add the onion and carrot and stir-fry together.
Season with salt and pepper.
Place mozzarella cheese on top, cover with a lid, and cook until the cheese melts.
Plate the finished dish.